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A method of brazing carbon fiber reinforced carbon matrix composites with si-zr high temperature solder

A technology of carbon-based composite materials and high-temperature solder, which is applied in welding equipment, metal processing equipment, manufacturing tools, etc., can solve the problems of poor high-temperature mechanical properties and low operating temperature, and achieve improved bonding strength, good fluidity, and high-temperature Excellent wettability and impregnation properties

Active Publication Date: 2021-01-29
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention is to solve the current C f / C composite brazing joints have technical problems of low service temperature and poor high-temperature mechanical properties, and provide a method for brazing carbon fiber-reinforced carbon-based composites using Si-Zr high-temperature brazing filler metal

Method used

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  • A method of brazing carbon fiber reinforced carbon matrix composites with si-zr high temperature solder
  • A method of brazing carbon fiber reinforced carbon matrix composites with si-zr high temperature solder
  • A method of brazing carbon fiber reinforced carbon matrix composites with si-zr high temperature solder

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specific Embodiment approach 1

[0019] Specific embodiment one: This embodiment is a method for brazing carbon fiber reinforced carbon-based composite materials using Si-Zr high-temperature solder, specifically according to the following steps:

[0020] 1. Preparation of Si-Zr solder: Grinding the surface of Zr sheets or Zr grains to remove scale, then putting Si blocks and Zr slices or Zr grains from which scales have been removed are placed in arc melting equipment, and arc melting is carried out under vacuum conditions. Heating for smelting and alloying, repeated smelting for 5 to 7 times, and natural cooling to obtain Si-Zr high-temperature solder; the mass fraction of Zr element in the Si-Zr high-temperature solder is 22% to 32%;

[0021] 2. Prepare brazing filler metal sheet: use wire cutting equipment to cut the Si-Zr high-temperature brazing filler metal prepared in step 1 into flakes, perform grinding treatment to remove scale, and then place it in absolute ethanol for ultrasonic cleaning for 5 minut...

specific Embodiment approach 2

[0023] Embodiment 2: This embodiment differs from Embodiment 1 in that: in step 2, place it in absolute ethanol for ultrasonic cleaning for 8 minutes. Others are the same as the first embodiment.

specific Embodiment approach 3

[0024] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the protective atmosphere in step 3 is nitrogen or argon. Others are the same as those in Embodiment 1 or 2.

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Abstract

A kind of brazing carbon fiber reinforced carbon matrix composite material (C f / c) The method relates to a method for brazing carbon fiber reinforced carbon-based composite materials using high-temperature solder. The present invention is to solve the current C f / C composite brazing joints have technical problems of low service temperature and poor high-temperature mechanical properties. The present invention: one, prepare Si-Zr solder; Two, prepare solder sheet; Three, brazing C f / C Composite. The invention adopts Si-Zr high-temperature brazing material to realize the brazing connection of carbon fiber reinforced carbon-based composite materials at 1400 ° C to 1480 ° C, and solves the problem of C f / C composite material brazing joints have poor high-temperature mechanical properties, and avoid the connection method that applies a large pressure and cannot connect complex C f / C composite material components and large pressure on C f / C composite materials are easy to cause damage, and the C f Application of / C composite materials in high temperature fields such as aerospace and nuclear power.

Description

technical field [0001] The invention relates to a method for brazing carbon fiber-reinforced carbon-based composite materials with high-temperature solder. Background technique [0002] Carbon fiber reinforced carbon matrix composites (C f / C composite material) has been widely used in aerospace and nuclear power fields due to its low density, high specific strength, low thermal expansion coefficient, and excellent high-temperature mechanical properties. C f / C Composite. However, in order to make C f / C composite materials meet the more severe service environment in engineering, and need to be prepared into large-scale components with complex shapes. In practical applications, the C f / C composite material to obtain the required components. [0003] About C f Scholars at home and abroad have carried out a lot of related research work on the connection of C / C composite materials. f The / C composite has a very high melting point, and it is difficult to achieve connect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K1/008B23K1/20
CPCB23K1/008B23K1/20
Inventor 李淳贺宗晶曹健兰博亓钧雷冯吉才
Owner HARBIN INST OF TECH